プログラミング学習の記録 699.3 10章(章全部で復習)の10.5(練習問題の続き(再帰))、「壁にビールが99本」 『初めてのプログラミング 第2版』(Chris Pine 著、長尾 高弘 訳、オライリー・ジャパン、2010年、ISBN978-4-87311-469-9)

開発環境

• Mac OS X Snow Leopard (OS)
• TextWrangler(Text Editor) (いずれはBBEditを入手したい！)
• Script言語:Ruby

『初めてのプログラミング 第2版』(Chris Pine　著、長尾 高弘　訳、オライリー・ジャパン、2010年、ISBN978-4-87311-469-9)の 10章(章全部で復習),　10.5(練習問題の続き)、「壁にビールが99本」を解いてみる。

 

「壁にビールが99本」

コード(TextWrangler)

#!/usr/bin/env ruby def english_number number if number < 0 return '負ではない数値を入力して下さい' end if number ==0 return 'zero' end num_string = '' ones_place = ['one','two','three', 'four','five','six', 'seven','eight','nine'] tens_place = ['ten','twenty','thirty', 'forty','fifty','sixty', 'seventy','eighty','ninety'] teenagers = ['eleven','twelve','thirteen', 'fourtenn','fifteen','sixteen', 'seventeen','eighteen','nineteen'] others = [['hundred',2], ['thousand',3], ['million',6], ['billion',9], ['trillion',12]] left = number while others.length > 0 name_and_num = others.pop name = name_and_num[0] num = 10 ** name_and_num[1] write = left / num left = left - write * num if write > 0 tri = english_number write num_string = num_string + tri + ' ' + name if left > 0 num_string = num_string + ' ' end end end write = left/10 left = left - write * 10 if write > 0 if((write == 1) and (left > 0)) num_string = num_string + teenagers[left-1] left = 0 else num_string = num_string + tens_place[write-1] end if left > 0 num_string = num_string + '-' end end write = left left = 0 if write > 0 num_string = num_string + ones_place[write-1] end num_string end num = 99 while true puts english_number(num).capitalize + ' bottles of beer on the wall, ' + english_number(num) + ' bottles of beer!' num = num - 1 if num == 1 break end puts 'Take one down, pass it around, ' + english_number(num) + ' bottles of beer on the wall!' end puts 'Take one down, pass it around, ' + english_number(num) + ' bottle of beer on the wall!' puts english_number(num).capitalize + ' bottle of beer on the wall, ' + english_number(num) + ' bottle of beer!' puts 'Take one down, pass it around, no more bottles of beer on the wall!'

入出力結果(Terminal)

$ ./ruby_program.rb Ninety-nine bottles of beer on the wall, ninety-nine bottles of beer! Take one down, pass it around, ninety-eight bottles of beer on the wall! Ninety-eight bottles of beer on the wall, ninety-eight bottles of beer! Take one down, pass it around, ninety-seven bottles of beer on the wall! Ninety-seven bottles of beer on the wall, ninety-seven bottles of beer! Take one down, pass it around, ninety-six bottles of beer on the wall! Ninety-six bottles of beer on the wall, ninety-six bottles of beer! Take one down, pass it around, ninety-five bottles of beer on the wall! Ninety-five bottles of beer on the wall, ninety-five bottles of beer! Take one down, pass it around, ninety-four bottles of beer on the wall! Ninety-four bottles of beer on the wall, ninety-four bottles of beer! Take one down, pass it around, ninety-three bottles of beer on the wall! Ninety-three bottles of beer on the wall, ninety-three bottles of beer! Take one down, pass it around, ninety-two bottles of beer on the wall! Ninety-two bottles of beer on the wall, ninety-two bottles of beer! Take one down, pass it around, ninety-one bottles of beer on the wall! Ninety-one bottles of beer on the wall, ninety-one bottles of beer! Take one down, pass it around, ninety bottles of beer on the wall! Ninety bottles of beer on the wall, ninety bottles of beer! Take one down, pass it around, eighty-nine bottles of beer on the wall! Eighty-nine bottles of beer on the wall, eighty-nine bottles of beer! Take one down, pass it around, eighty-eight bottles of beer on the wall! Eighty-eight bottles of beer on the wall, eighty-eight bottles of beer! Take one down, pass it around, eighty-seven bottles of beer on the wall! Eighty-seven bottles of beer on the wall, eighty-seven bottles of beer! Take one down, pass it around, eighty-six bottles of beer on the wall! Eighty-six bottles of beer on the wall, eighty-six bottles of beer! Take one down, pass it around, eighty-five bottles of beer on the wall! Eighty-five bottles of beer on the wall, eighty-five bottles of beer! Take one down, pass it around, eighty-four bottles of beer on the wall! Eighty-four bottles of beer on the wall, eighty-four bottles of beer! Take one down, pass it around, eighty-three bottles of beer on the wall! Eighty-three bottles of beer on the wall, eighty-three bottles of beer! Take one down, pass it around, eighty-two bottles of beer on the wall! Eighty-two bottles of beer on the wall, eighty-two bottles of beer! Take one down, pass it around, eighty-one bottles of beer on the wall! Eighty-one bottles of beer on the wall, eighty-one bottles of beer! Take one down, pass it around, eighty bottles of beer on the wall! Eighty bottles of beer on the wall, eighty bottles of beer! Take one down, pass it around, seventy-nine bottles of beer on the wall! Seventy-nine bottles of beer on the wall, seventy-nine bottles of beer! Take one down, pass it around, seventy-eight bottles of beer on the wall! Seventy-eight bottles of beer on the wall, seventy-eight bottles of beer! Take one down, pass it around, seventy-seven bottles of beer on the wall! Seventy-seven bottles of beer on the wall, seventy-seven bottles of beer! Take one down, pass it around, seventy-six bottles of beer on the wall! Seventy-six bottles of beer on the wall, seventy-six bottles of beer! Take one down, pass it around, seventy-five bottles of beer on the wall! Seventy-five bottles of beer on the wall, seventy-five bottles of beer! Take one down, pass it around, seventy-four bottles of beer on the wall! Seventy-four bottles of beer on the wall, seventy-four bottles of beer! Take one down, pass it around, seventy-three bottles of beer on the wall! Seventy-three bottles of beer on the wall, seventy-three bottles of beer! Take one down, pass it around, seventy-two bottles of beer on the wall! Seventy-two bottles of beer on the wall, seventy-two bottles of beer! Take one down, pass it around, seventy-one bottles of beer on the wall! Seventy-one bottles of beer on the wall, seventy-one bottles of beer! Take one down, pass it around, seventy bottles of beer on the wall! Seventy bottles of beer on the wall, seventy bottles of beer! Take one down, pass it around, sixty-nine bottles of beer on the wall! Sixty-nine bottles of beer on the wall, sixty-nine bottles of beer! Take one down, pass it around, sixty-eight bottles of beer on the wall! Sixty-eight bottles of beer on the wall, sixty-eight bottles of beer! Take one down, pass it around, sixty-seven bottles of beer on the wall! Sixty-seven bottles of beer on the wall, sixty-seven bottles of beer! Take one down, pass it around, sixty-six bottles of beer on the wall! Sixty-six bottles of beer on the wall, sixty-six bottles of beer! Take one down, pass it around, sixty-five bottles of beer on the wall! Sixty-five bottles of beer on the wall, sixty-five bottles of beer! Take one down, pass it around, sixty-four bottles of beer on the wall! Sixty-four bottles of beer on the wall, sixty-four bottles of beer! Take one down, pass it around, sixty-three bottles of beer on the wall! Sixty-three bottles of beer on the wall, sixty-three bottles of beer! Take one down, pass it around, sixty-two bottles of beer on the wall! Sixty-two bottles of beer on the wall, sixty-two bottles of beer! Take one down, pass it around, sixty-one bottles of beer on the wall! Sixty-one bottles of beer on the wall, sixty-one bottles of beer! Take one down, pass it around, sixty bottles of beer on the wall! Sixty bottles of beer on the wall, sixty bottles of beer! Take one down, pass it around, fifty-nine bottles of beer on the wall! Fifty-nine bottles of beer on the wall, fifty-nine bottles of beer! Take one down, pass it around, fifty-eight bottles of beer on the wall! Fifty-eight bottles of beer on the wall, fifty-eight bottles of beer! Take one down, pass it around, fifty-seven bottles of beer on the wall! Fifty-seven bottles of beer on the wall, fifty-seven bottles of beer! Take one down, pass it around, fifty-six bottles of beer on the wall! Fifty-six bottles of beer on the wall, fifty-six bottles of beer! Take one down, pass it around, fifty-five bottles of beer on the wall! Fifty-five bottles of beer on the wall, fifty-five bottles of beer! Take one down, pass it around, fifty-four bottles of beer on the wall! Fifty-four bottles of beer on the wall, fifty-four bottles of beer! Take one down, pass it around, fifty-three bottles of beer on the wall! Fifty-three bottles of beer on the wall, fifty-three bottles of beer! Take one down, pass it around, fifty-two bottles of beer on the wall! Fifty-two bottles of beer on the wall, fifty-two bottles of beer! Take one down, pass it around, fifty-one bottles of beer on the wall! Fifty-one bottles of beer on the wall, fifty-one bottles of beer! Take one down, pass it around, fifty bottles of beer on the wall! Fifty bottles of beer on the wall, fifty bottles of beer! Take one down, pass it around, forty-nine bottles of beer on the wall! Forty-nine bottles of beer on the wall, forty-nine bottles of beer! Take one down, pass it around, forty-eight bottles of beer on the wall! Forty-eight bottles of beer on the wall, forty-eight bottles of beer! Take one down, pass it around, forty-seven bottles of beer on the wall! Forty-seven bottles of beer on the wall, forty-seven bottles of beer! Take one down, pass it around, forty-six bottles of beer on the wall! Forty-six bottles of beer on the wall, forty-six bottles of beer! Take one down, pass it around, forty-five bottles of beer on the wall! Forty-five bottles of beer on the wall, forty-five bottles of beer! Take one down, pass it around, forty-four bottles of beer on the wall! Forty-four bottles of beer on the wall, forty-four bottles of beer! Take one down, pass it around, forty-three bottles of beer on the wall! Forty-three bottles of beer on the wall, forty-three bottles of beer! Take one down, pass it around, forty-two bottles of beer on the wall! Forty-two bottles of beer on the wall, forty-two bottles of beer! Take one down, pass it around, forty-one bottles of beer on the wall! Forty-one bottles of beer on the wall, forty-one bottles of beer! Take one down, pass it around, forty bottles of beer on the wall! Forty bottles of beer on the wall, forty bottles of beer! Take one down, pass it around, thirty-nine bottles of beer on the wall! Thirty-nine bottles of beer on the wall, thirty-nine bottles of beer! Take one down, pass it around, thirty-eight bottles of beer on the wall! Thirty-eight bottles of beer on the wall, thirty-eight bottles of beer! Take one down, pass it around, thirty-seven bottles of beer on the wall! Thirty-seven bottles of beer on the wall, thirty-seven bottles of beer! Take one down, pass it around, thirty-six bottles of beer on the wall! Thirty-six bottles of beer on the wall, thirty-six bottles of beer! Take one down, pass it around, thirty-five bottles of beer on the wall! Thirty-five bottles of beer on the wall, thirty-five bottles of beer! Take one down, pass it around, thirty-four bottles of beer on the wall! Thirty-four bottles of beer on the wall, thirty-four bottles of beer! Take one down, pass it around, thirty-three bottles of beer on the wall! Thirty-three bottles of beer on the wall, thirty-three bottles of beer! Take one down, pass it around, thirty-two bottles of beer on the wall! Thirty-two bottles of beer on the wall, thirty-two bottles of beer! Take one down, pass it around, thirty-one bottles of beer on the wall! Thirty-one bottles of beer on the wall, thirty-one bottles of beer! Take one down, pass it around, thirty bottles of beer on the wall! Thirty bottles of beer on the wall, thirty bottles of beer! Take one down, pass it around, twenty-nine bottles of beer on the wall! Twenty-nine bottles of beer on the wall, twenty-nine bottles of beer! Take one down, pass it around, twenty-eight bottles of beer on the wall! Twenty-eight bottles of beer on the wall, twenty-eight bottles of beer! Take one down, pass it around, twenty-seven bottles of beer on the wall! Twenty-seven bottles of beer on the wall, twenty-seven bottles of beer! Take one down, pass it around, twenty-six bottles of beer on the wall! Twenty-six bottles of beer on the wall, twenty-six bottles of beer! Take one down, pass it around, twenty-five bottles of beer on the wall! Twenty-five bottles of beer on the wall, twenty-five bottles of beer! Take one down, pass it around, twenty-four bottles of beer on the wall! Twenty-four bottles of beer on the wall, twenty-four bottles of beer! Take one down, pass it around, twenty-three bottles of beer on the wall! Twenty-three bottles of beer on the wall, twenty-three bottles of beer! Take one down, pass it around, twenty-two bottles of beer on the wall! Twenty-two bottles of beer on the wall, twenty-two bottles of beer! Take one down, pass it around, twenty-one bottles of beer on the wall! Twenty-one bottles of beer on the wall, twenty-one bottles of beer! Take one down, pass it around, twenty bottles of beer on the wall! Twenty bottles of beer on the wall, twenty bottles of beer! Take one down, pass it around, nineteen bottles of beer on the wall! Nineteen bottles of beer on the wall, nineteen bottles of beer! Take one down, pass it around, eighteen bottles of beer on the wall! Eighteen bottles of beer on the wall, eighteen bottles of beer! Take one down, pass it around, seventeen bottles of beer on the wall! Seventeen bottles of beer on the wall, seventeen bottles of beer! Take one down, pass it around, sixteen bottles of beer on the wall! Sixteen bottles of beer on the wall, sixteen bottles of beer! Take one down, pass it around, fifteen bottles of beer on the wall! Fifteen bottles of beer on the wall, fifteen bottles of beer! Take one down, pass it around, fourtenn bottles of beer on the wall! Fourtenn bottles of beer on the wall, fourtenn bottles of beer! Take one down, pass it around, thirteen bottles of beer on the wall! Thirteen bottles of beer on the wall, thirteen bottles of beer! Take one down, pass it around, twelve bottles of beer on the wall! Twelve bottles of beer on the wall, twelve bottles of beer! Take one down, pass it around, eleven bottles of beer on the wall! Eleven bottles of beer on the wall, eleven bottles of beer! Take one down, pass it around, ten bottles of beer on the wall! Ten bottles of beer on the wall, ten bottles of beer! Take one down, pass it around, nine bottles of beer on the wall! Nine bottles of beer on the wall, nine bottles of beer! Take one down, pass it around, eight bottles of beer on the wall! Eight bottles of beer on the wall, eight bottles of beer! Take one down, pass it around, seven bottles of beer on the wall! Seven bottles of beer on the wall, seven bottles of beer! Take one down, pass it around, six bottles of beer on the wall! Six bottles of beer on the wall, six bottles of beer! Take one down, pass it around, five bottles of beer on the wall! Five bottles of beer on the wall, five bottles of beer! Take one down, pass it around, four bottles of beer on the wall! Four bottles of beer on the wall, four bottles of beer! Take one down, pass it around, three bottles of beer on the wall! Three bottles of beer on the wall, three bottles of beer! Take one down, pass it around, two bottles of beer on the wall! Two bottles of beer on the wall, two bottles of beer! Take one down, pass it around, one bottle of beer on the wall! One bottle of beer on the wall, one bottle of beer! Take one down, pass it around, no more bottles of beer on the wall!

注意: capitalizeを忘れてた！9999本だとBloggerの文字数制限オーバー(？)になったので99本で実行。